450mm x 450mm(17.8"X17.8") D400-Heavy Duty Square Manhole Cover,FRP Manhole Cover,Composite manhole cover and frame

BETTERCOVER heavy duty square SMC FRP manhole cover and frame as per bs EN 124:1994 class D400. clear open dia. 450x450. factory produced, affordable, with longevity corrosion resistance, excellent anti-pressure.

  • Sample: Samples Available for Quality Evaluation
  • Production time:
    Quantity (set)1-2000>2000
    Day5-28negotiated
  • Customized: Ustomizable Sizes, Patterns & Logos
  • Transport: We support sea, air and land transportation.
Product description

summary

Quick details

  • Product name: SMC FRP Composite 450X450mm(17.8"X17.8") D400 Lockable Waterproof Manhole Cover  And Frame
  • Size: 590X590X60mm(23.3"X23.3"X2.4")
  • Clear open:  450X450mm(17.8"X17.8")
  • Function: Lockable, weather-resistant, corrosion-resistant, aging-resistant, impact-resistant, fatigue-resistant, waterproof/sealing, lightweight, non-slip, and anti-static,Theft-proof (no resale value)
  • Color: Black Color
  • Product Structure: Manhole cover and frame, removable side sealing structure, removable sealing handle aluminum sleeve and 3 M8x40 hexagon socket cylinder head lockable bolts
  • Net Weight: 25Kg
  • Product Material: The manhole cover and frame are made of SMC FRP composite material, the removable side sealing structure adopts corrosion-resistant EPDM, the aluminum sleeve of removable sealing handle adopts aluminum alloy, and the M8x40 hexagon lockable bolt adopts 304 stainless steel
  • Working Temperature: -50℃~+150℃
  • Product Standard: BS EN124:2015
  • Load Ratings: D400(40TON)
    Product details



    Function
    Waterpioof, Lockable, Anti Slip, Anti Static, Corrosion Resistantand aging resistant
    Product Color
    Black Color





    Product structure size

    (mm)

    Manhole cover  DepthManhole cover  DiaManhole Frame  HeightLoad Ratings
    40498X49860D400
    Manhole Frame Outer DiaClear  Open DiaInspection  CocerWeight(Kg)
    590X590450X450 25


    If the product is used in an unsealed environment for drainage or sewage ,the handle hole of the manhole cover is a drainage handle aluminum sleeve ,and removable rubber seal is not installed on the manhole Fram

    Application


    • Freight station
    • Wharf
    • Gas stations
    • Other heavy roads and sites frequently used



    • A15
      A155 Tonnes
      Areas which can only be used by pedestrians and pedal cyclists.
    • B125
      B12512.5 Tonnes
      Footways, pedestrian areas and comparable areas, car parks, or car parking decks.
    • C250
      C25025 Tonnes
      For gully gratings installed in the area of kerbside channels of roads. This area extends from a maximum of 0.5m into a carriageway to a maximum of 0.2m into the footway. Recommended for minor roads/areas of slow moving traffic.
    • D400
      D40040 Tonnes
      For covers and gratings used in carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.

    Constantly strive for perfection

    ●Support Customization Of Products With Customer Logo



    ●Screw locking mechanism



    ●Waterproof and non-slip

    Because the upper surface of the manhole cover is a raised bridge structure, it can effectively prevent the accumulation of rainwater on the surface of the manhole cover. The anti-skid ability of the surface of the manhole cover is greatly improved.


    ●The aluminum sleeve of removable sealing handle adopts aluminum alloy


    ●Watertight seal


    ●Frame


    ●Tool

    We have mature OEM and ODM experience

    Customizable logo, cover pattern, color and size





    Light weight

    The weight of composite manhole cover is 1 / 4 of that of traditional manhole cover with the same volume


    Excellent bridge structure



    Factory Overview


    Applications

    Products comply with EN124-5 2015 and AS3996 2006 standards, and are suitable for applications in -50°-150° ambient temperature, as well as in lawns, indoors, sidewalks, non-motorized lanes,car parking lots 、Gas stations, freight stations, docks and other heavy roads and sites that are frequently used Meet all kinds of products with A15, B125,C250, D400, E600 load-bearing grades.

    4641465343f2715e98909eaf0ee6e51b.png90c5817338386d026d57136c371e7c2d.png

    Packing and shipping

    We can provide standard carton, wooden box, iron pallet and other packaging, or according to your requirements.


    Other products
    CONTACT
    Please send the message
    © 2026 Wenzhou Kehui Road Facilities Co., Ltd. All Rights Reserved. Unauthorized reproduction or distribution of any content is prohibited.